A manual 5.0 vs manual m3 is probably close in 0.60 and quarter but in real life driving, on the freeway for example, dropping a few gears with dct into 3rd going 75 is wayyyyy faster than the 5.0.

sorry but i have a hard time believing that, both cars trap very similar in the 1/4. now maybe above 130mph the m3 might pull? i have no idea, but a 3rd gear drop should be a good race between both cars.